400375 has 8 divisors (see below), whose sum is σ = 499824. Its totient is φ = 320200.

The previous prime is 400339. The next prime is 400381. The reversal of 400375 is 573004.

It is not a de Polignac number, because 400375 - 2⁷ = 400247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1477 + ... + 1726.

It is an arithmetic number, because the mean of its divisors is an integer number (62478).

2⁴⁰⁰³⁷⁵ is an apocalyptic number.

400375 is a deficient number, since it is larger than the sum of its proper divisors (99449).

400375 is an equidigital number, since it uses as much as digits as its factorization.

400375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218 (or 3208 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 19.

The square root of 400375 is about 632.7519261132. The cubic root of 400375 is about 73.7036479780.

Adding to 400375 its reverse (573004), we get a palindrome (973379).

The spelling of 400375 in words is "four hundred thousand, three hundred seventy-five".